Convert the Thrustmaster TPR brakes to real-feeling load cells!
BOM for mechanical parts is on the PDF. Additionally, you will need 2x load cell amplifiers from Leo Bodnar:
http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=73&products_id=199
If you are using my VPForce FFB mod (https://github.com/smitty97/Force-Feedback-TPR), hook up the amplifiers to the 2 pot inputs on the USB board and set them as axes. Otherwise, you will need some kind of joystick input arduino.
Enjoy!